P asking device for automobiles



7 July 25, 1933. WALKER I Re. 18,904

Y PARKING DEVICE FOR AUTOMOBILES Original Filed May 3, 1927 s Sheets-Sheet 1 A TTORNEYS.

July 25, 1933. B WALKER 18,904 I PARKING DEVICE'FOR AUTOMOBILES Original Filed May 3, 1.927 3 Sheet-Sheet' 2 /4 l5 5 I v I I I f' IHI l ga u M J m luu r INVENTOR.

WWW

oiwnfiw WW A TTORNEYS.

I July 25, B WALKER Re. 18,904

PARKING DEVICE FOR AUTOMOBILES Original Filed May 3, 19 27 3 Sheets-Sheet 3 A T TORNEYS.

Reissue d July 25, 1933 limes; STATES" PATENT oFFlcE BRQOKsWAL-KER, or PIEDMONT, CALIFORNIA PARKING DEVICE FOR AUTOIVIOBILES Original No. 1,693,288, dated November. 27, 1928, Serial No. 188,429,'fi1ed May 3, 1927. Application for.

reissue filed April 22, 1930. Serial No. {146,370.

This invention relates to a parking device for automobiles and especlally to a device whereby the rear end and wheels of an automobile may be raised with relation to a pave-. ment and moved or swung laterally towards or away from the curbing.

The object of the present invention is to facilitate the parking of automobiles in congested districts where parking space is limited or where automobiles are so closely spaced that it is difficult to approach the curb.

The invention, briefly stated, consists in providing an attachment whichis adapted to 5 be operated by engine power, first to raise tration in'the accompanying drawings, in

which:

Fig; 1 is a partial sideelevation of an automobile showing the attachment of the parking device,

Fig. 2 is a Fig. 3 is a side elevation similar to Fig. 1 showing the rear end of an automobile and the parking device attached thereto,

Fig. i is an end view ofthe automobile and the parking device,

Fig. 5 is a detail view showing the shape of the teeth employed in the spur gear drive between the gear transmission shaft and the jack shaft, Y

Fig. 6 is a partial sectional and diagrammatic'view f the hydraulic gear pump and the cylinder and piston hydraulically actuated thereby, I

Fig. 7 is a side elevation partially in-section showing the method of driving the hydraulic gear pump. said view also showing the position of the hydraulically actuated cylinder and piston.

Referring to the drawings in detail and particularly Fig. 1, A indicates the main frame of an automobile, 2 the front wheels, 3 the rear wheels, 4 a standard form of-gear transmission, 5 the propeller shaft driven thereby, 6 the rear axle housing and 7 the differential housing which contains the usual.

, front wheels as a pivot.

b tt i f Fi 1 i serves a function of raisingor elevating the form of differential mechanism whereby the axles supporting the rear wheels are driven.

Extending crosswise of the main frame and securedthereto as at 8 is a cross shaft 9 upon which is pivotally supported as at 10 a bear- 1ng 11 and journaled. in the bearing is a shaft 12 which willfhereinafter be" referred to as the jack shaft. The ack shaft is in this instance disposed directly belowt-hcpropeller shaft and aligns therewith. One end of the jack. shaft carries a bevel gear-13 which is rear end of the automobile laterally about the r The jack shaft also rear end of the automobile and the driving wheels 3 with relation to a pavement such as indicated at B as this is necessary topermit lateral swinging movement of the rear end. Means must accordingly be provided for. raising. or lowering the rear end with relation to the jack shaft and theroller 16 or conversely for swinging the jack shaft about its pivot 10 downwardly against the pavement so as to elevate the rear end. The means em- .ployed is a toggle lever generally indicated at tion of the toggle links is shown in Fig. 1.

In order that the jack shaft may be swung from the elevated position shown in Fig. 3 to the lowered position shown in Fig. 1 and in order that the 'rearend may be-elevated with relation to the roller when in lowered position, considerablepower must be exerted. Power is, in this instance, obtained. from a '.hydraulic cylinder generally indicated at D to which oil or a like fluid medium is delivered through means of a power driven pump generally indicated at E. The cylinder D is provided with a. piston. and a piston rod 21.

Tlie'rod extends through opposite ends of thecylinder as shown in Fi g. 6, the rearwardly extending end indicated at 22 being employed to actuate a circuit making or breaking switch 23 which will hereinafter be described and I the forward endof the rod indicated at 24 is therear end will be swung laterally to one" side oranotheras the case may be. It is thus possible to park the automobile in a compara- 'towards the curbing; similarly, the same maneuvers being resorted to when it is d'e connected. through means ofa-connecting'rod 25 "with the central pivotal connection 19 of the toggle lever. moved by means of'oil under pressure in the direction of arrow kl (see Fig. 6), the toggle links will'be extended as shownin Fig. 1 and the jackshaft will first be loweredfrom the elevated positionshown in Fig. 3to'lowered.

position shown inFig.1 and the rear end. of t the automobile together with the driving wheels will next be raised to'assum'e the ele vated position also shown in Fig. 1. This is due to the fact that the lower link 18 is pivotallyattached as at 28"to a bracket 29 which in this instance is secured to one side of the differential housing. At the same time that the ack' shaft 12 islowered and the rear end' elevated, gears 13 and l lare thrown into sary to employ gear teeth, the outer ends of which are'pointed as indicated in Fig. 5 to insure meshing. v After the gears have been ,brought into mesh and the rear. end has been elevated,it is only necessary tomove the gear shift lever 30 either into low gear or reverse while the engine clutch is out of mesh, i. e., the gears are thrown into low if it is desired toswingthe rear. end laterally to the right and into reverse if it is desired to. swing the rear end laterally to the left. Ineitherinstance after the transmission gears. are .coupled it isonly necessary to let in theclutch in the usual manner as power will then be trans mittedthrough the gear transmission shaft to the gears 14 and 13. The iack' shaft 12 togethcr with the roller 16 will'thiis be rotated either in a'right or left-hand direction and tively small space and in fact into a space which is only a foot or more longer than the" I actual length. of the car as it is only necessary When approaching the curb to so steer the car" that the front end is brought up against the elevate the rear end so that it may be swung Hence, if the piston is' end of the car is elevated as shown in Fig. 1

that the entire weight is imposed on the toggle linksC and the roller 16 and that when power is transmitted through the gears 13 andl l to rotate the jack shaft and'the roller 16 that considerable side strain will develop and that there would accordingly be a tend};

ency to bend the jack shaftin one direction or another depending upon the direction of rdtation of the shaft and roller. In order to prevent bending of the shaft and to secure it against such movement, the bearing 27 is employed','i.' e., the bearing27 does not only form apivotal supportfo-r the lower. end 18 of the toggle lever but it also serves asa pivotal connection for a-radius armBl (see Figs. v

2 andt); The opposite end of this radius arm or lever is pivotally secured as at 32 to a vbra' cket 33. The'radius arm is accordingly of considerable importance as it rigidly secures the jack shaft against side strain when in lowered position. It should be noted that the downward movementof the jack shaft is along the dotted lineindicated at 34. In other words, the movement is slightly arcuate at the roller "end butit is comparatively small atthe pivotal end 10 or with relation to the bearing 11. In'fact, the arcuate movement at this end isso small that a slight play. or freeness of the bearing is suflicient to take care thereof. The s'ide'strain imposed on the jack "shaft during its loweredposition when swinging the rear end to the right or the left is also transmitted to a large extent to the upper supporting bracket 29. A brace rod such as indicated at 35 is accordingly provided;

side thrust is also developed at the upper end of the jack shaftbetween the gears 13 and 14.

A thrust bearing 37 movable between, two in terspacedi side plates 38 is accordingly provided and the thrust is accordingly taken care of.

In'actual practice, practically any type of cylinder having a piston movable from end. to end thereof may be'employed and it should similarly be'understood that any type of pump which serves the function of delivers ing fluid under pressure'thereto may be employed. It is, however, necessary to provide a valve such. as indicated at 40-to direct the der or theother as it is not only'essential to IlO lower the jack shaft and roller by means of vplowenmt a-lso'to return it to its normal or e y I e evate 'osition. Th' v 1 40 ll curbing and then to lower the jack shaft and p e V a V8 15 comm ed bythe driver through meansof a lever 41. I

When it assumes the position] shown in Fig.-

swmg sideways in the direction desired.

'- These signal lights are indicated at and of the cylinder, thus driving the piston in a direction opposite to that indicatcd by arrow (1; The valve at the same time serves'a funceftion ofpermitting the oil from the opposite 'end of the cylinder to return to the pump through the pipe 44. Means for limitingt-he movement of the piston in either direction or the other should also be provided. This is accomplished in the present instance by providing by-pass pipes 45 and 46. For ina stance, when the piston is travelling in the direction opposite to that indicated by the arrow a, its movement is stopped the moment it passes the pipe 45 as the oil can then discharge through-the pipes 45 and 44 which return the oil to the'pump. Similarly, if the valve 40 is set to discharge the oil from the pump through the pipe 44 the movement of the piston will be stopped the moment it passes the pipe 46. Check valvesare employed on both pipes and they only permit an oil flow therethrough in a direction indicated by the arrows.

The gear pump in this'instance is power driven from the transmission case, 1. e., a gear drive such as indicated at 47 (see Fig. 7) is employed. This gear through means of a jaw clutch- 48 drives the lower gear 49 of the pump. The jaw clutch is controlled by a lever 50 and as such permits the pump to be thrown into and out of operation when-f ever desired. In the'present instance, a pair of signal lights are employed to indicate the, position of the jack shaft and roller .16.

61 in F ig. 6; The circuit through the lights is controlled by a pair of switches such as indicated at 62 and 23. Whenever the parking device is required, the operator closes the switch 62. He then sets the valve so as to insure flow of the oil in the proper direction and finally meshes the jaw clutch '48 through the lever 50. If the piston and the rod 22 moves in the direction-of arrow (1 (see Fig. 6), the circuit-will be closed through the light 60 when the switch 23 assumes the dotted line position. Closing of the circuit through the light 60 indicates that therear' end has been fully elevated and it is the n' only necessary for the driver to throw out the engine clutch and to operate the gear shift lever to make the proper mesh. W'hen r he then lets in the clutch, the jack shaft will be rotated and the rear end of the car will When this has been accomplished, the driver I reverses the position of the valve 40 and the the circuit through the light 61 and thiswill indicate to the driver that the jack shaft has been fully elevated. He then disconnects the jaw clutch through the lever 50 and 23 maybe connected to the piston rod 22 in any suitable manner. In the present instance an ordinary strap 72 forms the connection. 5

In view of the fact that theremay be slight leakage between the piston and the cylinder D, it obvious that the piston would have a tendencyto gradually travel outivardly in the direction of arrow a due to the weight of the toggle links and jack shaft supported thereby when in raised position and that such leakage would cause the piston I position. This is accomplished in the present instance by providing a spring latch such as indicated at 74 in Fig. 4. The upper end of the spring latch is secured to the bracket 29 and the lower end of the spring latch is rounded to substantially fit the exterior contour of the roller 16. Hence, when .the jack shaft and roller are raised to elevated position, the spring latch is engaged and forced outwardly to a slight extent and as such will grip and secure the roller and the jack shaft and thereby retain the same in elevated position. v This spring latch also serves a function of reducing rattle in the connected parts and as such is of considerable importance.

I While certain features of the present in vention are more or less specifically de scribed and indlcated, I wish it understood that various changes may be resorted to within the scope of the appended claims, Similarly, that the materials and finish of the several parts employed may be such as the manufacturer may dictate or varying conditions or uses may demand.

Having thus described my invention, wh

I claim and desire to secure by Letters Patent 1s- 1. The combination with'th'e transmission shaft on a motor driven vehicle of a jack shaft, a pivotal'support for the shaft adjacent one end thereof, permitting said jack shaft to occupy ,a raised position parallel to the traction surface or a lowered position with one end thereof in contact with the traction surface, a roller secured on the opposite end .of the shaft, a toggle lever pivotally connected at one end of the jack shaft at a point tween the opposite end of thetoggle lever and i the axle assembly, engine, power actuated "means whereby the toggle lever is extended tion to a lowered position or vice versa and means whereby a driving connection between 65 as such is ready to drive away. The switch the transmission shaft and the jack shaft is '2thetraction surface or-a'lowered position automatically connected or disconnecteddur--v ing pivotal movement of the jack shaft 1 2. The combination with the transmission shaft on a motor driven vehicle of aja'ck shaft, a. pivotal support. for the shaftadjacent one end thereof, permitting said jack shaft to occupy a raisedrposition parallel to the traction surface or a lowered position with one end thereof inc'ontact with the trac-f whereby-a driving connection between the transmission shaft and the 'j ack shaft is autos maticallyconnected or disconnected during pivotal movement/0f the jack shaft, and means whereby the ack shaft is supportedin its raisedposition. 1 3. The combination with-the transmission shaft on a motor driven vehicle of a -jack "shaft, acpivotal support for the shaft adjacent one end thereof, permitting said fjack' shaft to occupy a raisedposition parallel to the tractionsurface or a lowered position" withone end thereof in contact, with the traction surface, a roller-secured on the op-. posite end ofthe shaft, a toggle lever pivotally connected at one end of the jack shaft at a point adjacent the roller, a. pivotal connecr tion'between the opposite end of the toggle I lever andthe,axle assembly, engine power actuated means whereby the'toggle lever" is extended' or retracted so-as to swing the jack shaft about its pivotal support from a raised position to a lowered position or vice versa, means whereby a driving connection between the transmission shaft and the jack-shaft is 51 automatically connected or disconnected:

during pivotal movement of the jack shaft and a spring clip engaging and'securing the roller on thejackshaft when in the raised position." r a shaft on'a motor driven vehicle of a jack shaft, a pivotal support for the shaft adjacent one end thereof, permitting said jack 1 shaft to occupy a raised: position parallel to with oneend'thereof in contact with the trac tion surface, a roller secured on the'opposite end of 'theshaft, a toggle lever pivotally' connected at one end of the jack shaft at a" point adjacent the roller, a pivotal'connection between the opposite end of the toggle lever and the axle assembly, engine power'actuated means whereby the toggle lever is extended or retracted so as tofswing the jack shaft 5 :about its pivotal support from ya raised .posi- I whereby'ia driving connection between the transmission shaft and the jack shaft is auto- *ma'tically connected or disconnected during pivotal movement of the jack shaft, and means securing the roller end of the jack shaft against lateral movement with relation to its longitudinal axis when in lowered position.

5; The combination with the transmis asion shaft on a motor driven vehicle of a jack shaft, a pivotal support-for the shaft adja' cent one endthereof, permitting-said jack shaft to occupy a raised position parallel to the traction surface or a lowered, position with" one end thereof in contact with the traction surface, a roller secured on the opposite endof "the shaft, a toggle lever pivotally point adjacent theroller, a pivotal connection between the oppositeend of the toggle shaft about its pivotal support from a raised position t-oia lowered position or vice versa,

connected at one end of the jack shaft; ata

means whereby a driving connection between the transmission shaft and the jack shaft is automatically connected or disconnected during pivotal movement '0f the jack shaft,

and means securing the roller end of the ack shaft against lateral movement With relation to its longitudinal axis when in theraised'or lowered position.

7 V 6., The combination With the transmission shaft on a motor driven vehicle of a jack shaft, a pivotal support for the shaft adja-:

cent one end thereof, permittingsaid jack shaft to occupy a raised position parallel to the traction surface or a lowered position.

with one end thereof in contact with the traction surface, a roller secured 'on the vopposite end of the shaft, atoggle lever piv otally connected at one end of the jack shaft at a point adjacent the roller, a pivotal connection between the opposite end of the tog-- gle lever andthe axle assembly, engine power actuated means whereby the toggle lever V is extended or retracted so as to swing the i a t y 1 r v t jack shaft'about its pivotal support from a I 4Q The combination. with the transmissionlf' raised position to a lowered position-or vice versa, means whereby a driving connection between the transmission shaft and the jack shaft is automatically connected or discontothe vehicleat one end and the jack shaft Iattheopposite end at a point adjacent the .roller, said radius armv securing the jack shaft against lateral movement with relation .to itsl longitudinal axis when inthe raised or-lowered position,

3 '7. The combination with the transmission if shaft on a motor driven vehicle of, a jack 7 shaft, a pivotal supportfor the shaft adjacent one end thereof, permitting-said jack whereby a driving connection between the transmission shaft and the jack shaft is'automatically connected or disconnected during pivotal movement of the jack shaft.

8. The combination with the transmission l5 shaft on a motor driven vehicle of a jack "shaft, a pivotal support for the shaft adjacent one end thereof, permit-ting said jack shaft to occupy a raised position parallel to the traction surface or a lowered position with one end thereof in contact with the traction surface, a roller secured on the opposite end of the shaft, engine power actuated means connected with the roller end of the jack shaft whereby the shaft is swung about ,its pivotal support from a raised position to 'a lowered position or vice versa, a gear se cured on the jack shaft on the end opposite the roller and a gear on the transmission shaft, said jack shaft gearadapted to be moved into and out of mesh with the transmission shaft gear during pivotal movement of the jack shaft. Y

9. The combination with the transmission shaft on a motor driven vehicle of a jack 3 'shaft, a pivotal support for the shaftadjacent one end thereof, permitting said jack shaft to occupy a raised position parallel to the traction surface or a lowered position with one end thereof in contact with the trac- 4 ,,tion surface, a rollersecured on the opposite "end of the shaft, engine power actuated means connected with the roller end of the jack shaft whereby the shaft is swung about its pivotal support from a raised position to tea lowered position or vice versa, a gear secured on the jack shaft on the end opposite the roller, a gear on the transmission shaft,

sa-id jack shaft gear adapted to be moved into and out of mesh with the transmission shaft gear during pivotal movement of the 'jack shaft, a thrust bearing on the end of the jack shaft adjacent the jack shaft and stationary side thrust members to receiveand guide the thrust bearing during pivotal moveifi ment of the jack shaft.

10. The combination with the transmission shaft on a motor driven vehicle of a jack shaft, a pivotal support for the shaft adjacent one end thereof, permitting said jack (Ml-shaft to occupy a raised position parallel to the traction surface or a lowered position with one end thereof in contact with the traction surface, a roller secured on the opposite end of the shaft, engine power actuated 66 means connected with the roller end of the jack shaft whereby the shaft is swungabout its pivotal support from a raised to a lowered position or vice versa, means whereby a driving connection between the transmission shaft and the jack shaft is automatically connected or disconnected during pivotal movement of the jack shaft and means for automatically indicating whether the -jack shaft is in raised or lowered position.

11. The combination with the transmission shaft on a motor driven vehicle of a'jack shaft,,a pivotal support for the shaft adjacent one end thereof, permitting said jack shaft to occupy a raised position parallel to the traction surface or a lowered position with one end thereof in contact with the traction surface, a roller secured on the opposite 7 end of the shaft, engine power actuated.

means connected with the roller end of the jack shaft wherebythe shaft is swung about its pivotal support from a raised to a lowered position or vice versa, means whereby a driving connection between the transmission shaft-and the ack-shaftis automatically connected or disconnected during pivotal movement of'the jack shaft and spring means for automatically securing and supporting the jack shaft in its raised position.

12. The combination with the transmission shaft on a motor driven vehicle of a jack shaft, a pivotal support for the shaft adjacent one end thereof, permitting said ack shaft to occupy a raised posit-ion parallel to the traction surface or a lowered position with one end thereofin contact with the traction surface, a roller secured on the opposite end of the shaft, engine power actuated means connected with, the roller end of the jack shaft whereby the shaft is swung about its pivotal support from a raised to a lowered position or vice versa, means whereby a driving connection between the transmission shaft and the jack shaft is automaticallyv connected or disconnected during pivotal movement of the jack shaft, means forv automatically securing and supporting the jack shaft in its raised position and means securing the roller end of the jack shaft against lateral movement with relation to.

its longitudinal axis when in the lowered position. I 7 13. The combination with the transmission shaft on a motor driven vehicle of a jack shaft, a pivotal support for the shaft adjacent one end thereof, permitting said jack shaft to occupy a raised position parallel to the traction surface or alowered position with one end thereof in contact with the. traction, surface, a .roller secured on the opposite end of the shaft, engine" power actuated means connected with the roller end of the jack shaft whereby the shaft is swung by a driving connection between the transmission shaft and'the'jack shaft is automaticall'y'gconnected or disconnected during pivotal movement of the jack shaft and a crownedface formed on the jack shaftroller.

, 14. The combination with the transmission shaft'on a motor driven vehicle of a jack shaft,a pivotal support for the shaft adja-- 1 cent one end thereof, permitting'said jack shaft to occupy a raised position paralleLto the traction surface or a lowered position with one end thereof in contact with the traction'surface, a roller secured-on the'opposite end [of the shaft, engine power actuated means connected with the roller end of the jack shaft whereby the shaft is swung about its 'pivotal support from a raised position to -a lowered position or vice'versa, a gear sejack shaft. M p 15. The combination with the transmission shaft-on] a motor driven vehicle offla rigid jack shaft, a pivotal support for the ack shaft adjacent one end thereof permitting said jack-shaft to occupy a raised position-- parallel to the traction'surface or a lowered position with one end of the same in contact t with the tracti'onfsurface, a roller on one end" 35 of the jack shaft .to permit movement of the same over the traction surface, engine power actuated means connected with said last mentioned end ofthe ack shaft whereby the ackshaft may be swung about its pivotal support from its raised position to its lowered position or vice versa, and a drivingconnection bletvfveen the transmission shaft and the jack sat..,v,'

r 16. The combination with the transmission shaft on a motor driven vehicle of a rigid jack shaft, apivotal supportfor'the "jack shaft adjacentone end thereof permitting said jack shaft to occupy a raised position with the traction surface, a roller on oneend parallel to the traction surface or a lowered position with one end of the same in contact of thejack shaft topermit movement ofthe same over the traction surface, engine power actuated means connected with said last-mentioned end of the jack shaft whereby thejjack shaft may beswung about its pivotal support from its raised position to its lowered position or vl'ceversa, and means whereby a driving connection between the transmission shaft and the Jack shaft is automatically connected or disconnected during pivotal move-" ment of thejack shaft.

- 17. The combination with the transmission shaft on a, motordriven vehicle of a'ri gid jack shaft, a pivotal supportfor the jack shaft: adjacent one end thereof permitting said jack to occupy a raised position parallel to the tractionsurface or a lowered position with one end of the same in contact'with the traction'surface, a roller on'one-end 0f the jack shaft-to permit movement of the same over the tractionsurface, engine power actuatedmean's connected with said last men tioned end of the jack shaft wherebythe' shaft may be swung about its pivotal support from its raised position to its lowered position or vice versa, a thrust bearin g on an end of the jack shaft adj acent its pivotal connection, and means whereby a driving'connection between the transmission shaft and the jack shaft is automatically connected or dis connected during pivotal movement of the shaft. '18; The combination with the transmission shaft on a motor driven vehicle of a rigid jackshaft, a pivotal support for the jack shaft adjacent one end thereof permitting said jack 'to occupy a raised positionlparallelto the traction surface or a lowered position with 7 one end in contact with the traction surface, aroller on one end of the jack shaft to permit movement of the same over the traction surface, means to swing the jack shaft about its pivotal support from'its raised position to is lowered position and vice versa, a driving connectlon between the transmlsslon shaft and the jack shaft, and a spring clip secured to the vehicle tohold said jack shaft in its raised position. v p

19. The combination with the transmission shaft on a motor driven vehicle ofa rigid jack shaft,fla pivotal support forthe jack shaft adjacent one end thereof permitting said jack shaft to occupy a raised position parallel to the traction surface or a 10W- ered' position with one end in contact with the traction surface, a roller on one end ofthe'jack shaft to permit movement of the same over the traction surface, engine'power actuatedzmeans connected with the said last mentioned end of the jackshaftwhereby the shaft maybe swung. about its pivotal-sup-' Y port from its raised position toits lowered pos tion or v1ce versa, means whereby'a dr v lng. connection between the tIaIISIIHSSIOD shaft and the jack shaft is automatically connected or disconnected during piv'otal' 'move ment of the jack shaft, 'a spring'clipsecured v to theyehicle to hold said jack 'sh'aft in its raised position, and. means for securing the" roller end of the jackshaft' against lateral movement with relation to its longitudinal axis when in a lowered position. 20. The combination with the transmission shaft on a motordriven vehicle'of a rigid'f1 25 j ack'shaft, a pivotal support for the jack shaft "adjacent one end thereof permitting said! ack shaft to occupy an inoperative posi tion. above the traction surface or anin'clined position with one end in contact therewith, a

roller secured on the last mentioned end of the jack shaft, a toggle lever pivotally 'conone end of the automobile and shifting it lat-' nected at an end of the jack shaft at a point adjacent the roller, a pivotal connection be-' tween the opposite end of the toggle lever and the axle assembly, engine power actuated means whereby the toggle lever is extended or retracted to swing the jack shaft about its 21. In an automobile, the combination with means, including a traction roller, for raising erally in either direction, a detent disposed adjacent the roller and engageable therewith to yieldablvhold the latter out of contact with the ground, and power actuated means I for moving the roller into and out of engagement with the detent, said detent being operable to engage or disengage by the direct application of force to the engaged member whereby auxiliary latch operated mechanism is eliminated. i r

22. The combination with a vehicle raising device, of a ground engaging member adapted to travel a transverse arcuate path about a point disposed at one side of the vehicle center line-to a vehicle raised position approxi-. mately under the longitudinal axis of the vehicle.

23. Incombination with a vehicle, a raising device and a latch for yieldably retaining the device inits inoperative position, said latch being operable to engage or disengage by the direct application of force to the en.-

gaged member wherebyauxiliary latch oper ated mechanism is eliminated.

24. In combination with a vehicle, a .power I actuated raising device and a latch for yieldably retaining the device'in its inoperative position, said latch being operable'to engage or disengage by the direct application of force to the engaged member whereby auxiliary latch operated mechanism is eliminated.

25. Ina vehicle parking device, a jack sh aft pivotally mounted at one end, means for raising and lowering the opposite end ofthe shaft with relation to a tractionsurface, and

a yieldable retaining member engageable with the shaft. and yieldably retaining the shaftin its raised position, said yieldable member being operable to engage or disengage by the direct application of force to the engaged member whereby auxiliary latch operating mechanism is eliminated.

BROOKS WALKER. 

